BMW fault code 001A
Engine electronics
In the engine electronics, code 001A means different things depending on the version of the module in the car. Find your car below; the app shows the right one for yours.
Lambda controller adaptation ti multiplicative
Module versions: Motor Electronics (DM5212R5), Motor Electronics (DM5212R6), Motor Electronics (DM528DS3)
In: 5 Series (E39) 1995–2003, 7 Series (E38) 1994–2001, X5 (E53) 1999–2006
Control unit permanent power
Module versions: Motor Electronics (DM338DS0), Motor Electronics (DM338DS1)
In: 7 Series (E38) 1994–2001
Lambda controller adaptation multiplicative OBDII error !!
Module versions: Motor Electronics (DM524DS0), Motor Electronics (DM528DS0)
In: 3 Series (E36) 1990–2000, 5 Series (E39) 1995–2003, 7 Series (E38) 1994–2001, X5 (E53) 1999–2006
DME: Multiplicat. mixture adaptation, bank 1, control limit reached
Module versions: Motor Electronics (ME72KWP0), Motor Electronics (ME72KWP1)
In: 3 Series (E46) 1998–2006, 5 Series (E39) 1995–2003, 7 Series (E38) 1994–2001, X5 (E53) 1999–2006, Z8 (E52) 2000–2003
DDE: Brake light switch/brake light test switch
Module version: Digital Diesel Electronics (DDE22DS0)
Which BMWs have this version depends on the engine and equipment, so we don't list them here; AutoLingo for BMW reads which version your car has.
DDE: Brake-light switch/brake-test switch
Module version: Digital Diesel Electronics (DDE30DS0)
Which BMWs have this version depends on the engine and equipment, so we don't list them here; AutoLingo for BMW reads which version your car has.
ignition coil 8
Module version: Motor Electronics (MSS54DS0)
In: 3 Series (E46) 1998–2006
Reading and clearing it
Fault code 001A is a BMW code, stored in the car's engine electronics, not a generic OBD2 code (P0xxx): a generic OBD2 reader only reaches the engine's emissions faults, so it won't show it. AutoLingo for BMW reads it with BMW's own diagnostic protocols, in plain English, with the details the module stored about it, and clears it after a repair. If a fault comes right back after it's cleared, the problem is still there.
The engine electronics is on: 8 Series (E31), 5 Series (E34), 3 Series (E36), Z3 (E36/7), 7 Series (E38), 5 Series (E39), 3 Series (E46), Z8 (E52), X5 (E53), X3 (E83), Z4 (E85), Z4 (E86)
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